In my below example of a simple shiny app i recently created, im currently trying to include also the possibility of downloading a data frame that is created from the results. I mention here part of the server.R script in order to not make a huge post:
shinyServer(function(input, output) {
table_options<- list(lengthMenu = list(c(5,10,15,20),
c('5','10', '15', '20')), pageLength = 15, ordering=TRUE,
class = 'cell-border stripe',dom ='t',scrollX = TRUE,
fixedColumns = list(leftColumns = 2, rightColumns = 1))
inTable <- reactive({# upload a tsv file
inFile <- input$file1
if (is.null(inFile))
return(NULL)
read.table(inFile$datapath,header=input$header,
sep="\t",stringsAsFactors = FALSE)
}) #END REACTIVE
rv <- reactiveValues()
rv$data <- NULL # to further use it into the observeEvent below
observeEvent(input$goButton, {
df <- inTable()
# some data manipulation with df...
if(input$repo_option=="mimic"){
# some functions here that result to a data frame named final dat
rv$data <- final.dat
rv$data
}
else if(input$repo_option=="reverse"){
# similar procedure...
rv$data <- final.dat
rv$data
}
})
output$contents <- DT::renderDataTable({
expr=DT::datatable(rv$data, options=table_options,
extensions ='FixedColumns',selection="none")
})
output$downloadData <- downloadHandler(
filename = function() { paste("input$file1", ".csv", sep=",") },
content = function(file) {
write.csv(rv$data,file)
}
)
})
My main issue is that, although the output$contents works fine in the app, when i press the download button from the ui.R server (not posted here for simplicity), the download "pop-up" window appears, but the saving does not work. Thus, i suspect that is something wrong with the code in the downloadHandler function, but any ideas or help ?
